E21C 25/02

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
2022/0372,875 Method for Rotary Clearing in Stripping Tooth Holder of Mining Machine and Rotary Clearing Device in Stripping Tooth HolderSep 10, 20Nov 24, 22Not available
2017/0002,656 NON-CONCENTRIC PROTRUDING SHAFT FIXED BEARING RECIPROCATING IMPACT PART FOR IMPLEMENTING RECIPROCATING IMPACT PART NON-CONCENTRIC PROTRUDING SHAFT FIXED BEARING METHODJan 29, 15Jan 05, 17Not available
2016/0273,357 METHOD OF LOADING MATERIAL BY CURVED AUXILIARY ROCKER ARM ON MINING MACHINE, AND MINING MACHINE HAVING CURVED AUXILIARY ROCKER ARM CAPABLE OF LOADING MATERIAL FOR IMPLEMENTING SAID METHODOct 21, 14Sep 22, 16Not available
2015/0145,316 SMALL-RESISTANCE HIGH-EFFICIENCY MINING DEVICE WITH MULTIPLE LAYERS OF PERCUSSION HEADSMay 10, 13May 28, 15Not available
2015/0137,580 HIGH-EFFICIENCY MINING METHOD FOR PERCUSSING FALLING-MATERIALS WITHOUT TRAPPING MATERIALS AND HIGH-EFFICIENCY MINING MACHINE FOR PERCUSSING FALLING-MATERIALS WITHOUT TRAPPING MATERIALSMay 10, 13May 21, 15Not available
2013/0015,696 HYDRAULIC RESONANT BREAKING HAMMERDec 31, 10Jan 17, 13Not available
2012/0187,744 HYDRAULIC RIPPER FOR EXCAVATORSFeb 15, 10Jul 26, 12Not available